Ondol, Korean traditional heating system, has widely been used due to high thermal efficency based on its character of thermal dynamics. it has been also well known Ondol has improved real indoor thermal comfort compared to the other heating systems. Recently, a lot of numerical studies using CFD(Computational Fluid Dynamics) in order to understand interal thermal and flow field has been corned out. In present study, we find out the variation of temporal temperature in floor of traditional Goodie between Jul-Gorae and Doidon-Gorae, we have performed numerical analysis. According to flow rate streams, Weet-mok's temperature in a Doidon-Gorae is 7 t:: higher than Jul-Gorae 's. This asymmetry part has an influence on decreasing a standard deviation of the temperature.

1. Instroduction
 2. Governing equation and Numerical procedure
 3. Analysis Model and Boundary Condition
  3.1 Analysis Model
  3.2 Boundary Condition
 4.Results and Discussions
 5. Conclusion
 Reference

• Jong Min Moon(Graduate School of Mechanical & Information Engineering, University of Seoul)
• Shinho Rhee(Department of Agricultural & Rural Engineering, Chungbuk National University,)
• Gwang Hoon Rhee Corresponding author